India, May 12 -- At least nine people were killed and more than two dozen injured after a bomb rigged to a rickshaw exploded in a crowded bazaar in northwest Pakistan on Tuesday, in the latest attack highlighting the worsening security situation near the Afghanistan border.

The blast occurred in Lakki Marwat district of Khyber Pakhtunkhwa province, where a bomb rigged to a rickshaw exploded in a busy bazaar, local police chief Azmat Ullah said. Two traffic police personnel and a woman were among those killed, The Associated Press reported.

No group has claimed responsibility for the attack so far, though suspicion is expected to fall on the Pakistani Taliban, or Tehrik-e-Taliban Pakistan (TTP). The outfit, which is separate from but all...